Discharge Circuit and Soft Start Method for Reducing Hall Thruster Start-up Shock
A Hall thruster and starting shock technology, applied in thrust reversers, machines/engines, using plasma, etc., can solve problems such as starting shock, affecting equipment work, and easy to reach the thruster anode, reducing the starting shock, Stable and reliable operation, the effect of increasing the number of available firings
Active Publication Date: 2020-05-29
SHANGHAI INST OF SPACE PROPULSION
View PDF4 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] The traditional ignition method is to ignite when all the power sources are powered on. At this time, due to the instantaneous breakdown of the cathode, a very large instantaneous ignition current will be generated. Under the traction of the electric field, it is easy to reach the anode of the thruster, causing huge start-up shock
At the same time, since the excitation coil of the thruster and the heating wire of the cathode can be regarded as inductive elements, a large induced potential and current will be induced instantaneously, which will endanger the reliability of the power supply and the thruster
Therefore, this traditional starting method can ensure the successful ignition of the thruster, but it endangers the reliability of the thruster, power supply, etc. At the same time, the EMC shock interference of the system at the moment of ignition will also affect the work of other surrounding equipment.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0025] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0026] Based on the defects of traditional start-up methods, the present invention proposes a soft-start method that reduces the start-up shock of the Hall thruster. The core idea is: when the thruster is ignited with a very low anode voltage, the discharge channel is weakly ionized. Most of the working fluid is still in the molecular state, which reduces the instantaneous current reaching the anode, and the potential and current induced by the heating wire, magnetic coil, etc. are also very small, there...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a discharge loop for reducing starting impact of a Hall thruster and a soft start method thereof. According to the discharge loop, a filter module is additionally arranged, andan excitation coil is placed behind the filter module. The soft start method comprises the steps of optimizing power supply, gas supply mode and timing. The filter module belongs to a RLC low-pass filter loop as a whole, and the influence of low-frequency oscillation of discharge current on a power processing unit can be reduced. The connection relation of the excitation coil is that the positiveend of the coil is connected to the common ground of the thruster, and the negative end of the coil is connected to the negative end of an anode power supply, so that the current fluctuation of the excitation coil is reduced as much as possible. According to the discharge loop for reducing starting impact of the Hall thruster and the soft start method thereof, the starting impact of the Hall thruster can be greatly reduced, it is guaranteed that the thruster and the power processing unit can work stably and reliably for a long time, and the available ignition times of the Hall thruster is effectively improved.
Description
technical field [0001] The invention relates to the field of Hall thruster control, in particular to a discharge circuit and a soft start method for reducing the starting impact of the Hall thruster. Background technique [0002] The Hall thruster is one of the most widely used electric thrusters at present, and has the advantages of high thrust density, high specific impulse, and simple structure. The traditional Hall thruster ignition process is as follows: figure 1 As shown, the starting impact test results are as follows figure 2 shown. The traditional ignition method is: gas supply from cathode and anode; ignition, heating, anode, excitation and other power supplies are energized in a rated manner at the same time; after the thruster is ignited, turn off the ignition and heating, and the thruster starts to work in a rated manner; open as needed Auxiliary excitation. [0003] The traditional ignition method is to ignite when all the power sources are powered on. At ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & AuthorityPatents(China)
IPC IPC(8): F03H1/00
Inventor程佳兵王宣王亚楠刘鹏张敏苗思薇
OwnerSHANGHAI INST OF SPACE PROPULSION